Abstract
An object-based view of attention holds that when one aspect of a visual scene is attended, the object to that that attribute “belongs” is attended in its entirety, and all attributes of that object will receive enhanced processing. This differs from the more traditional spatial attention view that likens attention to a spotlight or zoom lens moving from location to location and enhancing processing of whatever falls within its beam. The experiments described in this chapter give neural evidence for the existence of object-based attention. When subjects attend to one attribute of a scene consisting of two superimposed transparent objects, fMRI activity is increased for the attended attribute and for the unattended attribute of the attended object, relative to the attributes of the unattended object at the same spatial location.
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